From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o6RBOFPf182039 for ; Tue, 27 Jul 2010 06:24:15 -0500 Received: from enyo.dsw2k3.info (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3748015C780F for ; Tue, 27 Jul 2010 04:34:38 -0700 (PDT) Received: from enyo.dsw2k3.info (enyo.dsw2k3.info [195.71.86.239]) by cuda.sgi.com with ESMTP id hdg59a8VVTvDJG8B for ; Tue, 27 Jul 2010 04:34:38 -0700 (PDT) Date: Tue, 27 Jul 2010 13:27:00 +0200 From: Matthias Schniedermeyer Subject: Re: High latencies writing to a memory mapped file Message-ID: <20100727112700.GA26093@citd.de> References: <20100722144706.GA2840@BohrerMBP.rgmadvisors.com> <20100727092452.GA23307@citd.de> <20100727124750.30bb3209@harpe.intellique.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20100727124750.30bb3209@harpe.intellique.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Emmanuel Florac Cc: Shawn Bohrer , xfs@oss.sgi.com On 27.07.2010 12:47, Emmanuel Florac wrote: > Le Tue, 27 Jul 2010 11:24:52 +0200 > Matthias Schniedermeyer =E9crivait: > = > > In case anybody has an idea what i could do to identify and/or > > isolate the root-cause, i'm open for suggestions. > > = > = > I'd thought that the io scheduler is the culprit. I've generally found > that the default CFQ scheduler (default) is terrible for file servers. I have 'deadline'ed the server, if that is the culprit then i will = "know" in about a month. (As i don't know how to force the problem i can = only wait for the problem not to happen. :-| ) Bis denn -- = Real Programmers consider "what you see is what you get" to be just as = bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor -- complicated, = cryptic, powerful, unforgiving, dangerous. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs